<PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="10.0.0" />

EnvironmentVariablesExtensions

public static class EnvironmentVariablesExtensions
Provides extension methods for registering EnvironmentVariablesConfigurationProvider with IConfigurationBuilder.
using Microsoft.Extensions.Configuration.EnvironmentVariables; using System; using System.Runtime.CompilerServices; namespace Microsoft.Extensions.Configuration { [System.Runtime.CompilerServices.NullableContext(1)] [System.Runtime.CompilerServices.Nullable(0)] public static class EnvironmentVariablesExtensions { public static IConfigurationBuilder AddEnvironmentVariables(this IConfigurationBuilder configurationBuilder) { configurationBuilder.Add(new EnvironmentVariablesConfigurationSource()); return configurationBuilder; } public static IConfigurationBuilder AddEnvironmentVariables(this IConfigurationBuilder configurationBuilder, [System.Runtime.CompilerServices.Nullable(2)] string prefix) { configurationBuilder.Add(new EnvironmentVariablesConfigurationSource { Prefix = prefix }); return configurationBuilder; } public static IConfigurationBuilder AddEnvironmentVariables(this IConfigurationBuilder builder, [System.Runtime.CompilerServices.Nullable(new byte[] { 2, 1 })] Action<EnvironmentVariablesConfigurationSource> configureSource) { return builder.Add(configureSource); } } }